20452342450155 has 48 divisors (see below), whose sum is σ = 41107518074112. Its totient is φ = 8499674779200.

The previous prime is 20452342450151. The next prime is 20452342450171. The reversal of 20452342450155 is 55105424325402.

It is not a de Polignac number, because 20452342450155 - 2² = 20452342450151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20452342450151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 804880741 + ... + 804906150.

It is an arithmetic number, because the mean of its divisors is an integer number (856406626544).

Almost surely, 2^{20452342450155} is an apocalyptic number.

20452342450155 is an abundant number, since it is smaller than the sum of its proper divisors (20655175623957).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20452342450155 is a wasteful number, since it uses less digits than its factorization.

20452342450155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609786928 (or 1609786917 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 42.

Adding to 20452342450155 its reverse (55105424325402), we get a palindrome (75557766775557).

The spelling of 20452342450155 in words is "twenty trillion, four hundred fifty-two billion, three hundred forty-two million, four hundred fifty thousand, one hundred fifty-five".